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[1]刘博,王春雨,耿伟超,等.大空间设置上、下悬窗自然排烟效果对比研究*[J].中国安全生产科学技术,2022,18(1):87-94.[doi:10.11731/j.issn.1673-193x.2022.01.014]
　LIU Bo,WANG Chunyu,GENG Weichao,et al.Comparative analysis on natural smoke exhaust effect of top and bottom hung windows in large space[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2022,18(1):87-94.[doi:10.11731/j.issn.1673-193x.2022.01.014]
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大空间设置上、下悬窗自然排烟效果对比研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
18
期数:
2022年1期
页码:
87-94
栏目:
职业安全卫生管理与技术
出版日期:
2022-01-31

文章信息/Info

Title:
Comparative analysis on natural smoke exhaust effect of top and bottom hung windows in large space
文章编号:
1673-193X(2022)-01-0087-08
作者:
刘博; 王春雨; 耿伟超; 邓军; 刘长春
（1.西安科技大学 安全科学与工程学院，陕西 西安 710054；
2.中国建筑科学研究院有限公司，北京 100013）
Author(s):
LIU Bo;  WANG Chunyu;  GENG Weichao;  DENG Jun;  LIU Changchun
(1.College of Safety Science and Engineering,Xi’an University of Science and Technology,Xi’an Shaanxi 710054,China;
2.China Academic of Building Research,Beijing 100013,China)
关键词:
大空间; 上、下悬窗; 自然排烟; 数值模拟
Keywords:
large space;  top and bottom hung windows;  natural smoke exhaust;  numerical simulation
分类号:
X932
DOI:
10.11731/j.issn.1673-193x.2022.01.014
文献标志码:
A
摘要:
为研究大空间设置上、下悬窗自然排烟效果的差异，采用FDS软件针对某大空间在不同开窗形式、环境风下室内温度、能见度、CO浓度和烟气蔓延规律进行分析。结果表明：无风时，上、下悬窗均能够有效排烟，但下悬窗总排烟量比上悬窗高出30%，开下悬窗时，室内温度安全区域的临界高度比上悬窗高出27%，能见度安全区域的临界高度比上悬窗高出10%；风速为3 m/s时，上悬窗自然排烟失效，距地2 m处能见度低于10 m，而下悬窗依然可以有效排烟，且室内烟气层温度比上悬窗低17%，室内能见度安全区域的临界高度比上悬窗高出65.3%。故建筑应优先采用下悬窗排烟，若需采用上悬窗，可通过关闭迎风侧悬窗来减小环境风对自然排烟影响，并增大背风侧悬窗开启角度，来增大有效排烟面积，以达到良好的排烟效果。
Abstract:
In order to study the difference of natural smoke exhaust effect between top and bottom hung windows in large space,the FDS software was used to analyze the indoor temperature,visibility,CO concentration and smoke spread laws in a large space under different window opening forms and environmental wind.The results showed that when there was no wind,the smoke could be exhausted effectively through top and bottom hung windows,but the total smoke exhaust rate of the bottom hung window was 30% higher than that of top hung window.When the bottom hung window was opened,the critical height of the indoor temperature safety zone was 27% higher than that of top hung window,and the critical height of the visibility safety zone was 10% higher than that of top hung window.When the wind speed was 3 m/s,the natural smoke exhaust of the top hung window failed,and the visibility at 2 m above ground was less than 10 m.However,the bottom hung window could still effectively exhaust smoke,and the indoor smoke layer temperature was 17% lower than that of top hung window,and the critical height of indoor visibility safety zone was 65.3% higher than that of top hung window.Therefore,the bottom hung window should be preferred for the smoke exhaust in buildings.If the top hung window was needed,the influence of environmental wind on the natural smoke exhaust could be reduced by closing the windward hung window,and the opening angle of leeward hung window could be increased to increase the effective smoke exhaust area,so as to achieve good smoke exhaust effect.

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相似文献/References:

[1]解志龙.CFAST在大空间火灾模拟中的应用研究[J].中国安全生产科学技术,2012,8(4):69.
　XIE Zhi long.Application of CFAST in fire simulation of large scale buildings[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2012,8(1):69.

备注/Memo

备注/Memo:
收稿日期： 2021-03-31
* 基金项目： 国家自然科学基金青年科学基金项目（51904233）
作者简介： 刘博，博士，讲师，主要研究方向为阻燃材料、城市公共安全。
通信作者： 耿伟超，硕士，助理工程师，主要研究方向为建筑防火设计。
更新日期/Last Update: 2022-02-19